Factor analysis supports the theory-based grouping of items and is evidence-based on internal structure.

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Factor analysis is a statistical method that is used to group items that are related to each other. These groups are then used to identify underlying constructs, or factors, that explain the variation in the data. This technique is based on the theory that items that are related to each other will group together, and that these groups will reflect a meaningful structure that is consistent with the theory underlying the construct. Factor analysis is therefore evidence-based on the internal structure of the data and supports theory-based grouping of items.

Factor Analysis Supports the Theory-Based Grouping of Items and Is